Electro-magnetic car-signal



(No Model.)

J. W. MARLEY.

ELBGTRO MAGNETIC GAR SIGNAL. No. 271,882. Patented Feb. 6, 1.883.

I V /%MK Zm V I l N. mans. mwum m. wumnpm ac UNITED STATES PATENT OFFICE.

JOHN W. MARLEY, CHICAGO, ILLINOIS.

I ELECTRO-MAGNET|C CAR-SIGNAL.

SPECIFICATION forming part of Letters :IPatent Lid 271,882, dated February 6, 1883.

Application filed September 6, 1882. (No model.)

- had to the accompanying drawings, illustrating the improvement.

The object of the present invention is to provide means which will automatically indicate to the engineer thatthe train must be stopped at any point between two stations to avoid accident, and to provide better means for the person having charge of the train to communicate with a front or rear station agent for thegreater safety ofmoving trains of cars. This I accomplish by electro-magnets placed at such intervals between stations as deemed most practicable, and connecting these magnets with the telegraph-wire, so that the armature of any one electro-magnet between two stations maybe so set from either station that a trip-bar on the engine will come in contact with a trigger on the armature, and be so moved (where the train is moving in either direction) that an apparatus on the engine or locomotive willsound the alarm for the train to be stopped and .thc armature be so reset as to permit trains to'pass and repass without the alarm being sounded, as-the whole in detail is fully shown and described. 1

Referring to the figures in the drawings,-

' Figure 1 is a side skeleton view of a locomo tive-en gine carrying the alarm apparatus; Fig.

. 2, a top or plan view of one-half of the pilot to which thetrip-bar is attached; Fig. 3, an end elevation of the magnet box and magnets therein,lookingin the direction of dart m, Fig. 1.

Arepresents an ordinary locomotive-engine; G, the cab, and B the pilot thereto.

N is the railroad'track.

D represents a suitable box to contain the ordinaryelectro-magnets,EE. Thisboxisrigidly attached to one or more rails of the track, so asalways to be in the same relative vertical position thereto.

Rigidly connected with the box D isa strong vertical guide, d, through which a trigger, c E,passes, and is permitted to have a free vertical reciprocating movement. The lower end of this trigger is pivoted to a slotted eye, I), on

the end of the armature f, and on the upper end is formed a cam, F, the contact of which with the tripbar e on the pilot B will give the alarm to the engineer, as after this stated.

This trip-bar is pivoted to the pilot-frame, so as to lie about one and one-half inch above the rail N, so that. it swings in a horizontal plane, and to insure its always lying at right angles to the rail when not acted on, a coilspring, m, is attached to the trip-barat its in-,

ner end, and to the pilot, as shown at Fig. 2. The inner end of the trip-bar supports a stud-,- n, to which an end ofa rod, G, isjointed. This rodpasses back through eyes S S, and isjointed to an elbow-lever, H, which is pivoted to the cab at r. The rear end of this elbow-lever,'by means of a suitable joint, supports a vertical rod, I, which has a guide in a sleeve, J, attached to an elbow-rod, 1. This rod is pivoted to the cab or other suitable support at 3, and to prevent it from getting out of positiona stop, 2, is placed below'it.

Above the sleeve J is placed a lug, 4, and above the elbow-rod l is hung a bell-hammer, 6, to operate on a hell, 9. To prevent the bellhammer from coming in contact with the rods I 1 when not in use, a stop, 7, is placed below it, as shown at Fig. 1. This construction is such that the alarm will be given when the engine moves either backward or forward. For example, when the engine is moving forward the trip-bar'ewill be thrown back by coming in contact with the cam F on the trigger 0, and consequently draw forward the rod (3:, draw down the red I, and by means of the lug 4 on the rod and sleeve turn the elbow-rod 1 so as to bring its vertical part against the bellhammer, and as a result the alarm will be sounded from the bell 9. Should the engine be run backward, the rod G will be drawn toward the pilot B and the rod I.will strike the bell-hammer.

The boxes 1). are to be located at suitable places between stations, that the station agent may stop a train should it become necessary. The real merit of thisinvention,from the following, will be fully comprehended: Suppose elevated to come in contact with the trip-bartrain should meet with an accident seven miles from station A at about the time a train passes station B. Now, the conductor on the train which met with an accident can connect a wire with the main line in the ordinary manner of reporting in such cases and notify the agent at B of the condition of affairs with his train,

and the operator at station B could have the connection broken at A, and then bring all the armatures f inthe four boxes to the magnets, so as to elevate the cams F to positions so the trip-bar eon the engine of the train which left station B would cpme in contact with the cam Fvand alarm the engineer, so as to stop his train before running into the train which. left sta- 6; but when the current is off, the-trigger c F, by its gravity, will bring the armature down onto a bracket-stop, a, in which position the cam F will be below the bar .6.

In the foregoing I haveshown and described mechanism to operate in combination with the electro-magnet, whereby a train of cars might be signaled 5 but I do not claim to have been the first to place a tripping device near the rail, so as to put a signal apparatus in operation on thelocomotive independent of the magnet, as such devices have been before used. I therefore confine my invention to signals where theelectro-magnet is employed to hold the trigger at the side of the rail up so as to come in contact with the trip-lever on the locomothe Having thus described my invention, what i I claim, and desire to secure by Letters Patent of the United States, is

In railway-signals, the electro-magnets connected with the telegraph-wire L, in combination with the trigger F c and its lever-conned,

tion with the magnets, to hold the trigger up to come in contact with the trip-lever on the locomotive so as to put in operation an alarm apparatus on the locomotive, substantially as specified.

JOHN WESLEY MARLEY. Witnesses:

G. L. GHAPIN, HENRY FRANKFURTER. 

